I am afraid the preamp will over drive the headphone amp. Please tell me if I am OK.
Yesterday I tried to plug the Allnic preamp in between the CD player and my Woo WA3. It turned out OK. I was able to listen with the Woo WA3 setting the volume at 9am position and the Allnic L3000 at 10am. I like the sound compared to without the Allnic in between.
I just want to report back and thank you.